This is a .30-06 Springfield standard barrel from a 1952 Winchester Model 70 rifle.
Bluing - 90%. The bluing is dark and even with just a little wear showing at the muzzle.
Metal - This barrel is in very good condition. It has a dime-sized patch of shallow pitting hear the chamber and a scratch through the date marking on the bottom of the barrel, but no other notable damage.
Bore - 8/10 - The bore has some light wear and no notable pits. Borescope verified.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE